linux-kernel - Re: [PATCH 1/1] ASoC: codecs: max98090: Allow dsp

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Date:   Wed, 21 Jun 2023 21:46:05 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Maxim Kochetkov <fido_max@...ox.ru>
Cc:     alsa-devel@...a-project.org, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ASoC: codecs: max98090: Allow dsp_a mode

On Wed, Jun 21, 2023 at 10:57:18PM +0300, Maxim Kochetkov wrote:
> On 21.06.2023 17:35, Mark Brown wrote:

> > > > > I'm saying there should be some interlock between these two settings, if
> > > > > nothing else setting DSP A mode should force TDM mode with automatically
> > > > > configured slot sizes.

> Ok. How about that:
> ---
>  sound/soc/codecs/max98090.c | 52 ++++++++++++++++++++-----------------
>  sound/soc/codecs/max98090.h |  2 ++
>  2 files changed, 30 insertions(+), 24 deletions(-)

That looks plausible, yes.

I do note that the driver ignores tdm_width (and the entire TDM
configuration) when configuring BCLK, I guess it only works in clock
consumer mode for TDM?  If that's the case there should really be some
validation, and there should probably be a check for slot width being 16
since that looks like the only thing supported.  Those were already
broken though.

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